CN1060524C - Dry-off oven device for blast furnace - Google Patents

Dry-off oven device for blast furnace Download PDF

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Publication number
CN1060524C
CN1060524C CN98110986A CN98110986A CN1060524C CN 1060524 C CN1060524 C CN 1060524C CN 98110986 A CN98110986 A CN 98110986A CN 98110986 A CN98110986 A CN 98110986A CN 1060524 C CN1060524 C CN 1060524C
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CN
China
Prior art keywords
oven
dry
blast furnace
air
burner
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CN98110986A
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Chinese (zh)
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CN1211623A (en
Inventor
戴为志
张友建
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上海宝钢冶金建设公司
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Priority to CN98110986A priority Critical patent/CN1060524C/en
Publication of CN1211623A publication Critical patent/CN1211623A/en
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Publication of CN1060524C publication Critical patent/CN1060524C/en

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Abstract

The present invention discloses a device of a baking oven for a hot-blast stove, which is mainly composed of the device body of a baking over, a cooling system for a heat storing chamber and a stove grate, a pipeline system for a combustion medium and a measuring and regulating system, wherein three combustors with combusting nozzles, an annular diluent air box, and interfaces and manholes of combustion medium pipelines are arranged on the device body. The present invention can be used for accurately controlling the temperature and the temperature difference of a baking oven for a hot-blast stove and the water content in a drying-resistanct material and ensuring the intercrystalline effective variation of refractory bricks. The device is especially suitable for the baking cover for a hot-blast stove of a large-size blast furnace.

Description

Dry-off oven device for blast furnace
The present invention is relevant, especially relevant with the baker equipment of silicon brick hot-blast stove with hotblast stove with blast furnace.
Modern blast furnace adopts the good silicon brick hot-blast stove of high-temperature stability mostly, because that silica brick has is different with high alumina brick, i.e. cold zone (100 ℃-300 ℃) rate of expansion height is in case above 500 ℃ then volume is basicly stable.Therefore, low thermophase must slowly heat up during the silicon brick hot-blast stove baker, to prevent destroying masonry because of volume sharply changes the generation internal stress.Simultaneously, need consider that also the silica brick phase transformation has the property of reverse,, crack to avoid masonry to expand repeatedly shrinking so can not drop to again below the transformation temperature after require heating up.
Coke-oven gas, the combustion air of being sent here by supporting pipe network if can be carried out mixed firing by a certain percentage, control the flow and the pressure of its gas simultaneously, send into the hot blast of differing temps stage by stage to hotblast stove, just can dry the moisture content in the anti-material of hotblast stove, guarantee its physicochemical property according to the anti-material of silica brick, finish the drying of its intergranular variation and moisture content, finally guarantee the ordinary production and the work-ing life of hotblast stove.
Also do not have at present a cover to possess the equipment of above-mentioned functions fully, the same category of device of Japanese the eighties is owing to existing the problems such as selection of the steel and the anti-material of key part, so still there is defective aspect the processing requirement that satisfies the hotblast stove baker.
The objective of the invention is to, overcome the deficiencies in the prior art, a kind of novel dry-off oven device for blast furnace is provided, it can control the temperature and the temperature difference of hotblast stove baker exactly, dries its moisture content of anti-the material, and guarantees that the refractory brick intergranular effectively changes.Satisfy following technical requirements simultaneously:
1, body housing can bear 1100 ℃ high temperature;
2, the body burner still can keep its original geometrical shape under the high temperature that bears about 1300 ℃, and is convenient to remove.
3, regenerator fire grate cooling tubing air current composition is reasonable, and there is not the dead band in cooled region, and fire grate is excellent between drying-out period, is convenient to remove;
4, accurately measure, regulate the flow that enters the furnace drying device combustion medium, guarantee the temperature and the temperature difference of baker.
For achieving the above object and technical requirements, the present invention has adopted following technical scheme:
A kind of dry-off oven device for blast furnace mainly is made of furnace drying device body, regenerator fire grate cooling system, combustion medium tubing system and measuring and adjusting system; Described furnace drying device body mainly is provided with the mixing section of the sprayed coating of anti-material the, big adapter bonnet, bend pipe, little adapter bonnet and body burner by its inwall and constitutes by the flange connection; Its contour structures is that a head is conical horizontal round shape; At the head of described mixing section the one diluent air annular bellows that evenly has dilution wind air outlet opening in it is set; Afterbody at described mixing section evenly is provided with three burners that have burner, and each burner is connected with the combustion medium pipeline again; On described furnace drying device body, be respectively arranged with the interface of combustion medium pipeline; In the side of described device body mixing section one manhole is set; Described device body, the sprayed coating on its inwall is selected CN-130 for use, CN140, the anti-material of CH-160 type; The burner of described device body, its sheating material are selected the drum steel for use No. 20, i.e. 20g, and the sprayed coating of its inwall is selected the anti-material of CH-160 type that is complementary with it for use; Described regenerator fire grate cooling system, mainly the spigot-and-socket thin metallic tubd connection by double-layer staggered even layout constitutes.
Compared with prior art, the present invention has following beneficial effect:
1, because the selection science of apparatus of the present invention body housing, especially the rational Match of the anti-material of sprayed coating on the selection of body burner shell and its inwall, make the body burner can not only withstand 1400 ℃ high temperature, the shape that also can keep its original geometry, the color and luster normal shape of the inner sprayed coating of anti-the material is intact, except that preparation work, the take-off time of single burner only needs 4~5 minutes.
And the same category of device of Japan is the A3 steel because its housing selects for use, when temperature only is 500 ℃-600 ℃, and its yield strength δ sApproach zero, so when temperature rose to 1300 ℃, its body housing was burnt and with hole brick bonding, the sprayed coating of anti-material of its inside is burnt down trickling, the take-off time of single burner reaches nearly 40 minutes.
2, adopt the regenerator fire grate cooling system of the spigot-and-socket thin metallic tubd of double-layer staggered even layout as the cooling duct formation, compare with the stainless steel thin-wall metallic snakeskin flexible pipe that Japanese same category of device is adopted, air current composition is more reasonable, substantially there is not the cooling dead band, thereby increased the draught area of regenerator bottom, guaranteed the safety of fire grate between drying-out period.Also satisfied fire grate simultaneously in the hot requirement of fast quick-detach down.
3, because the present invention is provided with the measuring and adjusting system based on control coke-oven gas, combustion air and diluent air flow, utilize the measuring sensors such as fow-through orifice, pressure pipe and thermopair that are provided with in the system, just can control the temperature and the temperature difference in the baker process exactly.
Description of drawings:
Fig. 1 is a technology floor plan synoptic diagram of the present invention;
Fig. 2 is apparatus of the present invention body construction synoptic diagram;
Fig. 3 is a roast technic schematic diagram of the present invention.
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
A kind of dry-off oven device for blast furnace, as shown in Figure 1, this device mainly is made of furnace drying device body 1, regenerator fire grate cooling system, combustion medium tubing system and measuring and adjusting system.For guaranteeing the baker effect, the head that the contour structures of device body 1 is designed to as shown in Figure 2 is conical horizontal round shape, and mainly be provided with the mixing section 9 of the sprayed coating of anti-material the 8, big adapter bonnet 10, bend pipe 11, little adapter bonnet 12 and body burner 13 by its inwall and connect by flange 14 and constitute, the anti-material of described sprayed coating 8 can be selected CN-130, CN140, CH-160 type for use.Head at described mixing section 9 is provided with the diluent air annular bellows 25 that its inside evenly has dilution wind air outlet opening 24, and it is connected with diluent air pipeline 26; By 120 ° of five equilibriums three burners 16 that have burner 15 are set on the afterbody circumference of mixing section 9, each combustor nozzle 15 is connected with coke oven gas pipe 6, combustion air pipeline 28 respectively; The telescoping structure that pipe and outer tube were formed in the burner 15 of the burner that the employing stainless steel is made was served as reasons.On described device body 1, be respectively arranged with the interface of corresponding combustion medium pipeline; In the side of described device body mixing section 9 manhole 17 is set, is used for the cleaning and the inspection of preceding its inside of baker.
For making body burner 13 can under the high temperature that bears about 1300 ℃, still can keep its original geometrical shape, and be convenient to remove, No. 20 drum steel of elite usefulness, be the sheating material of 20g as body burner 13,8 of the sprayed coatings of its inwall have been selected the anti-material of CH-160 type that is complementary with it for use, and its refractoriness is 1820 ℃.
Adopt the thin metallic tubd of the double-layer staggered even layout of spigot-and-socket to constitute regenerator fire grate cooling system as cooling duct 5, cooling duct 5 is connected with cooling air pipeline 27, its wall thickness can be 0.5mm-0.75mm, caliber is φ 200mm-φ 225mm, preferably selecting wall thickness for use is 0.6mm, and caliber is the cooling duct of φ 210mm.
For guaranteeing that device body 1 shell can bear the high temperature more than 1100 ℃, the present invention has adopted and set up the measure that a diameter is the air blast cooling endless tube 21 of φ 780mm-φ 820mm on the outer wall of the big adapter bonnet 10 of its body, and its optimum parameter can be selected φ 800mm for use; And evenly to have the aperture on the tube wall of air blast cooling endless tube 21 be φ 6mm-φ 10mm, and its width between centers is the aperture of 75mm-85mm, can select optimum parameter for use, and promptly the aperture is φ 8mm, and the width between centers in hole is 81mm.
As shown in Figure 3, the present invention is main measuring sensor with fow-through orifice 18, pressure pipe 19, thermopair 20.And be equipped with variable valve and registering instrument etc. (not drawing among the figure) and form measurements, control, self registering closed loop feedback measuring and adjusting system, fow-through orifice 18 and pressure pipe 19 are set respectively on coke oven gas pipe 6, combustion air pipeline 28 and diluent air pipeline 26, utilize the pressure reduction △ P value between the pressure pipe, then can accurately measure the flux values of various combustion mediums; The patchhole of one thermopair 20 is set on the shell of little adapter bonnet 12, and in the hole, inserts thermopair 20, with the intensification of control baker.
The combustion medium tubing system mainly comprises coke oven gas pipe 6 and air line 7, wherein also comprises the nitrogen pipeline (not drawing among the figure) that is connected with coke oven gas pipe 6, and the coal gas that the coal gas when being used for auxiliary firing is introduced and installed when removing purges.
Can follow these steps to carry out baker:
1, introduce coke-oven gas, light the burning torch 22 on the body, and be inserted in the device body mixing section 9;
2, in combustor nozzle 15, send into coke-oven gas and feed combustion air, regulate the ratio of coal gas and air, it is burnt in mixing section 9, when it is lighted by 23 observations of the vision slit on the body among Fig. 2 and the incendiary state;
3,, detect the temperature out of body 1 according to the thermopair 20 that is arranged on the little adapter bonnet 12;
4, in the burner 16 of device body, feed a certain amount of diluent air, suitable hot blast is sent into hotblast stove;
5, by being arranged on respectively several thermopairs 20 (as shown in Figure 3) on the hotblast stove of forming by regenerator 4, combustion chamber 2 and mixing section 3, detect its temperature value and according to the baker heating curve of formulating (not drawing among the figure), at any time regulate the flow of coke-oven gas, combustion air, diluent air, with the temperature and the temperature difference of controlling the hotblast stove baker exactly, dry the moisture content in its anti-material, and guarantee that the refractory brick intergranular effectively changes.
Metallic substance 20g of the present invention, its component, performance are like table 1, table 2, table 3.
Sprayed coating refractory materials CN-130 of the present invention, CN140, CH-160, its specification, component, performance are like table 4, table 5.
The chemical ingredients of table 1 20g steel
Technological standard Chemical ingredients (%)
????C ????Si ????Mn ????P ????S
?GB 713—86 ?0.16~0.24 ?0.15~0.30 ?0.35~0.65 ≤0.035 ≤0.035
The mechanical property of table 2 20g steel
Technological standard Condition of delivery Thickness of slab (mm) ????6 b????(MPa) ??6 s(MPa) ??δ 6?(%) α K(J/cm 2) Akv (J) Cold bending test 180 *
Normal temperature Strain aging
GB713-86 Hot rolling or thermal treatment 6~16 400~540 ≥245 ≥26 ≥59 ≥29 ≥27 ????d=2a *
17~25 ≥235 ≥25 ≥25
26~36 ≥225 ≥24
38~60 ≥225 ≥23
>60~100 390~530 ≥205 ≥22 ?????d=2.5a *
105~120 ≥185 ≥49
*: d is a bending diameter; A is a sample thickness.
The physicals of table 3 20g steel
Table 4
Table 5

Claims (10)

1, a kind of dry-off oven device for blast furnace, it mainly is made of furnace drying device body (1), regenerator fire grate cooling system, combustion medium tubing system and measuring and adjusting system; Described furnace drying device body mainly is provided with the mixing section (9) of the sprayed coating of anti-material the (8), big adapter bonnet (10), bend pipe (11), little adapter bonnet (12) and body burner (13) by its inwall and connects formation by flange (14); Its contour structures is that a head is conical horizontal round shape; At the head of described mixing section the one diluent air annular bellows (25) that evenly has dilution wind air outlet opening (24) in it is set; Afterbody at described mixing section (9) evenly is provided with three burners (16) that have burner (15), and each burner all is connected with the combustion medium pipeline; On described furnace drying device body (1), be respectively arranged with the interface of combustion medium pipeline, a manhole (17) be set in the side of described device body mixing section (9); It is characterized in that described device body 1, the sprayed coating on its inwall (8) are selected CN-130, CN140, the anti-material of CH-160 type for use; The burner of described device body 1 (13), its sheating material are selected the drum steel for use No. 20, i.e. 20g, and the sprayed coating of its inwall (8) is selected the anti-material of CH-160 type that is complementary with it for use; Described regenerator fire grate cooling system, mainly the spigot-and-socket thin metallic tubd by double-layer staggered even layout constitutes as cooling duct (5).
2, dry-off oven device for blast furnace according to claim 1 is characterized in that, the wall thickness of described cooling duct (5) is 0.5mm-0.75mm, and caliber is φ 200mm-φ 225mm.
3, dry-off oven device for blast furnace according to claim 1 is characterized in that, described combustion medium tubing system mainly comprises coke oven gas pipe (6) and air line (7); Described air line (7) comprises combustion air pipeline (28), diluent air pipeline (26) and cooling air pipeline (27).
4, dry-off oven device for blast furnace according to claim 3 is characterized in that, described diluent air pipeline (26) is connected with described diluent air annular bellows (25); Described cooling air pipeline (27) is connected with described regenerator fire grate cooling duct (5).
5, dry-off oven device for blast furnace according to claim 1, it is characterized in that, what pipe and outer tube were formed in the burner (15) of described burner (16) was served as reasons is telescopic, and coexists with burner (16) and to press 120 ° of five equilibrium settings on the afterbody circumference of mixing section (9).
6, dry-off oven device for blast furnace according to claim 1, it is characterized in that, it is the air blast cooling endless tube (21) of φ 780mm-φ 820mm that one diameter is set on the outer wall of the big adapter bonnet (10) of described device body, evenly has aperture on the tube wall of described air blast cooling endless tube (21).
7, dry-off oven device for blast furnace according to claim 6 is characterized in that, the aperture that described air blast cooling endless tube (21) is gone up aperture is φ 6mm-φ 10m, and the width between centers in hole is 75mm-85mm.
8, dry-off oven device for blast furnace according to claim 1 is characterized in that, described combustor nozzle (15) is connected with coke oven gas pipe (6), combustion air pipeline (28) respectively.
9, dry-off oven device for blast furnace according to claim 1 is characterized in that, described measuring and adjusting system mainly comprises fow-through orifice (18), pressure pipe (19), thermopair (20).
10, dry-off oven device for blast furnace according to claim 1 is characterized in that, the shell of the little adapter bonnet of described device body (12) is provided with the patchhole of thermopair, and inserts thermopair (20) in the hole; On described coke oven gas pipe (6), combustion air pipeline (28) and diluent air pipeline (26), be respectively arranged with fow-through orifice (18) and pressure pipe (19).
CN98110986A 1998-07-29 1998-07-29 Dry-off oven device for blast furnace CN1060524C (en)

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CN98110986A CN1060524C (en) 1998-07-29 1998-07-29 Dry-off oven device for blast furnace

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CN1060524C true CN1060524C (en) 2001-01-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101900489A (en) * 2010-09-08 2010-12-01 中冶北方工程技术有限公司 Grate-kiln-circular cooler furnace drying device and furnace drying method thereof

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CN103884012B (en) * 2014-02-25 2016-07-06 中盐安徽红四方股份有限公司 Furnace drying method
CN108298500A (en) * 2017-01-12 2018-07-20 洛阳丰瑞氟业有限公司 A kind of modification scheme improving anhydrous hydrogen fluoride yield and quality production technology
CN108823344B (en) * 2018-08-09 2020-04-14 上海二十冶建设有限公司 Method for dismantling hot blast stove drying device in limited space
CN109022657A (en) * 2018-08-09 2018-12-18 上海二十冶建设有限公司 The installation method of dry-off oven device for blast furnace under a kind of restricted clearance

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1089135A1 (en) * 1982-12-17 1984-04-30 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Method for drying and heating-up blast furnace air heaters
SU1504255A1 (en) * 1987-07-13 1989-08-30 Всесоюзный научно-исследовательский институт металлургической теплотехники Method of drying and primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone
SU1661219A1 (en) * 1989-01-24 1991-07-07 Всесоюзный научно-исследовательский институт металлургической теплотехники Method of drying and warming up of air heaters with high-temperature zone lined with corundum refractory
SU1680774A1 (en) * 1989-03-09 1991-09-30 Всесоюзный научно-исследовательский институт металлургической теплотехники Method for drying and warming up air heater having filled nozzle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1089135A1 (en) * 1982-12-17 1984-04-30 Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт Им.Л.И.Брежнева Method for drying and heating-up blast furnace air heaters
SU1504255A1 (en) * 1987-07-13 1989-08-30 Всесоюзный научно-исследовательский институт металлургической теплотехники Method of drying and primary heating of blast-furnace air-heater lined with silica brick in high-temperature zone
SU1661219A1 (en) * 1989-01-24 1991-07-07 Всесоюзный научно-исследовательский институт металлургической теплотехники Method of drying and warming up of air heaters with high-temperature zone lined with corundum refractory
SU1680774A1 (en) * 1989-03-09 1991-09-30 Всесоюзный научно-исследовательский институт металлургической теплотехники Method for drying and warming up air heater having filled nozzle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101900489A (en) * 2010-09-08 2010-12-01 中冶北方工程技术有限公司 Grate-kiln-circular cooler furnace drying device and furnace drying method thereof

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